Motor direct connection structure of beam-pumping unit
By using the motor rotor and the reducer input shaft in the gusset type oil pump to fix the connection between the motor rotor and the reducer input shaft through the tightening sleeve, and the stator and the reducer housing are fixedly installed, the bearing damage caused by the wear of the reducer is solved, and the operating stability of the motor is improved and the failure rate is reduced.
Patent Information
- Application Number
- CN202422231554.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-12
- Publication Date
- 2025-08-29
- Estimated Expiration
- 2034-09-12
AI Technical Summary
In existing gaze beam oil pumps, the wear of the reducer causes the input shaft to rake and radially jump, which is transmitted to the motor shaft, damage the bearings, affecting the safe and stable operation and life of the motor, and replacing the bearings requires shutdown and maintenance, affecting production.
The motor rotor and the reducer input shaft are fixedly connected by a tightening sleeve, and the stator and the reducer housing are fixedly installed, and the bearings between the rotor and the stator are cancelled to achieve direct clearance matching between the rotor and the stator.
Simplify the structure, avoid bearing damage, improve the operating stability of the motor, reduce the failure rate, and reduce the frequency of shutdown and maintenance.
Smart Images
Figure CN223285644U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of oil pumping motors, in particular to a motor direct-connection structure of a beam pumping unit. Background Art
[0002] In the oilfield pumping unit industry, in the context of energy conservation and carbon reduction, replacing the original pulley and asynchronous motor with an energy-efficient permanent magnet synchronous motor, creating a semi-direct drive structure, is the current mainstream solution. This involves replacing the original pulley with a flat permanent magnet motor with a hollow shaft supported by two pairs of bearings. This hollow motor is connected to the high-speed input shaft of the reduction gearbox, which then drives the reducer. However, this solution has some issues. First, due to wear of the reduction gears over time, the input shaft experiences axial and radial runout. This movement and runout are transmitted to the motor shaft, placing additional forces on the motor bearings, which can damage the bearings and seriously affect their safe and stable operation and lifespan. Bearing replacement requires significant downtime and disassembly, significantly impacting normal production and capacity. Utility Model Content
[0003] The purpose of the utility model is to provide a motor direct-connected structure of a beam pumping unit to solve the problems raised in the above background technology.
[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a motor direct-connected structure of a walking beam pumping unit, comprising a reducer and a motor, wherein a transverse input shaft is provided on the side of the reducer, and the motor comprises a stator and a rotor, wherein the rotor is located in the inner cavity of the stator and is loosely fitted therewith, the input shaft and the rotor are coaxially fixedly connected by a tightening sleeve, and the stator is fixedly mounted to the housing of the reducer by bolts.
[0005] Preferably, a junction box is installed on the front side of the stator housing.
[0006] Preferably, the outer shell of the stator is circular or square, and heat dissipation ribs are provided on the side of the square outer shell.
[0007] Compared with the prior art, the beneficial effects of the present invention are: direct clearance fit between the rotor and the stator, the rotor is directly mounted on the input shaft through a tightening sleeve, the stator is fixed to the housing of the reducer, the bearing between the rotor and the stator is eliminated, and shutdown for maintenance due to bearing damage is avoided, thereby reducing the failure rate and improving the stability of operation. BRIEF DESCRIPTION OF THE DRAWINGS
[0008] Figure 1 This is a schematic diagram of the three-dimensional structure of the first embodiment of the present utility model;
[0009] Figure 2 This is a schematic diagram of the explosion structure of Example 1 of the present utility model;
[0010] Figure 3 This is a schematic diagram of the three-dimensional structure of the second embodiment of the present utility model;
[0011] Figure 4 This is a schematic side sectional view of the second embodiment of the present invention.
[0012] In the figure: 1. Reducer; 11. Input shaft; 2. Input shaft; 3. Motor; 31. Stator; 32. Rotor; 33. Tensioning sleeve. DETAILED DESCRIPTION
[0013] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.
[0014] For example 1, please refer to Figure 1 、 2 The utility model provides a technical solution: a motor direct-connected structure of a walking beam pumping unit, comprising a reducer 1 and a motor 3. A transverse input shaft 11 is provided on the side of the reducer 1. The motor 3 comprises a stator 31 and a rotor 32. The outer shell of the stator 31 is in the shape of an oblate disc and a terminal box is installed on the front side. The rotor 32 is located in the inner cavity of the stator 31 and is concentrically fitted with the stator 31. The input shaft 11 and the rotor 32 are coaxially fixedly connected by a tightening sleeve 33. The rotor 32 and the stator 31 are fixedly mounted to the housing of the reducer 1 by bolts.
[0015] For the second embodiment, please refer to 3 and 4. The difference from the first embodiment is that the outer shell of the stator 31 is square and has heat dissipation ribs on the side.
[0016] Working principle: There is a direct clearance fit between the rotor 32 and the stator 31. The rotor 32 is directly mounted on the input shaft 11 through the tightening sleeve 33. The stator 31 is fixed to the housing of the reducer 1. There is no bearing between the rotor 32 and the stator 31, thereby simplifying the structure and eliminating the problem of bearing damage due to force impact.
[0017] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A motor direct-connected structure for a beam pumping unit, comprising a reducer (1) and a motor (3), wherein a transverse input shaft (11) is provided on the side of the reducer (1), and characterized in that: The motor (3) comprises a stator (31) and a rotor (32); the rotor (32) is located in the inner cavity of the stator (31) and is clearance-matched therewith; the input shaft and the rotor (32) are coaxially fixedly connected via a tightening sleeve (33); and the stator (31) is fixedly mounted to the housing of the reducer (1) via bolts.
2. The motor direct-connect structure of a beam pumping unit according to claim 1, characterized in that: A junction box is installed on the front side of the stator (31) housing.
3. The motor direct-connect structure of a beam pumping unit according to claim 1, characterized in that: The outer shell of the stator (31) is circular or square, and heat dissipation ribs are provided on the side of the square outer shell.